Katrina at 1st year the exams in comparison to 2nd year and further on are very easy, they lasted about 1 hour 30 mins at most for many of the subjects in my school. If you study relevant areas to the course that you re doing you could do extremely well,in 1st year A's are very common but still i recommend you dont relax too much as theyre designed for 1st years so prepare for them regardless.